Fly-chasing attachment for doors.



J. W. SHUMATE.

FLY CHASING ATTACHMENT FOR DOORS.

APPLICATION FILED JAN.2'7, 1913.

1,080,598, Patented Dec. 9, 1913.

2 SHEETS-SHEET l.

cOLIMmA PLANOGRAY'II 50., WASHINGTON. u. c.

J. W. SHUMATE.

FLY CHASING ATTACHMENT FOR DOORS.

APPLIOATION FILED JAN.27, 1913.

1,080,598. Patented Dec. 9, 1913.

I 2 SHEETS-SHEET 2. A 1 57, 5 I I COLUMBIA PLANOORAPH c0. WASHINGTON l). c.

JOSEPH W. SHUMATE, 0F MINNEAYOLIS, MINNESOTA.

FLY-CHASING ATTACHMENT FOR DOORS.

Specification of Letters Patent.

Patented Dec. 9,1913.

Application filed January 27, 1913. Serial No. 744,418.

To all whom it may concern:

Be it known that I, JOSEPH \V. SHUMATE, a citizen of the United States, residing at ll linneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Fly-Ghasing Attachments for Doors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to devices for preventing flies and other insects from entering a house through a doorway while the screen door applied to the said doorway is opened and has for its object to improve the construction and action of such devices.

To such ends, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view in elevation showing the invention applied to a screen door; Fig. 2 is a side or edge elevation of the parts shown in Fig. 1; Fig. 3 is an enlarged fragmentary view of certain of the parts shown in Figs. 1 and 2; Fig. 4 is a vertical section taken on the line 02* w on Fig. 3; Fig. 5 is a vertical section taken on the line 00 on Fig. 3; and Fig. (i is a horizontal section taken on the line as as on Fig. 3.

The numeral 1 indicates a door frame and the numeral 2 an ordinary screen door hung therein in the customary Way on suitable hinges 3. The door is put under tension to close by a yielding device in the form of a coiled spring 4 of the clock spring type, which, at its outer end is anchored to a casing 5, and at its other end is anchored to a short shaft or spindle 6, suitably journaled in the said casing and provided at its outer end with a drum or grooved wheel 7. This drum 7 is connected to a projecting bracket 8 on the door 2 by a cable 9. This cable 9 runs over a guide sheave 10 suitably journaled on the door frame 1, and also over an idle guide sheave 11 and over a grooved hub 12, which latter acts as a driving wheel or pulley. The sheave 11 is journaled on one or the other of a pair of sleeve-like bosses 13 formed on the casing 5. The purpose of the two bosses 18 will be hereinafter noted.

The hub 12 within the casing 5 has a disklike flange 12 formed with a cylindrical flange 12 that is concentric to the surface of the said hub 12. The said parts 12, 12 and 12 constitute a friction driving wheel having concentric frictional driving surfaces. The hub 12, as shown, has an axial recess to receive a bearing sleeve 14, the outer end of which is secured to a bearing arm 15. Rigidly secured to the hub 12 is an. axial spindle 16 that is loosely journaled in the sleeve 14; and is provided at its outer end with a nut 17 which normally holds it in operative position or against axial displacement. Riveted or otherwise rigidly secured to the outer end of the arm 15 is a stud 18 adapted to be inserted into the bore of either of the sleeve-like bosses 13. The said stud will always be inserted into the boss 13 on which the guide sheave 11 is journaled. The casing 5 will be secured by screws, or otherwise, to the casing, as shown in Fig. 3, and the sheave 1.1 will be journaled on the boss 13 which is at the bottom of the casing. Hence, it follows that this device is adapted to be applied either to doors swinging toward the right or toward the left, or, stated in another way, the said casing and device attached thereto are reversible to adapt them for application to doors swinging in either direction.

The intermediate portion of the cable 9 is passed in one direction around the sheave 11 and in the opposite direction around the grooved hub 12, so that always the said wheel and hub, when rotated, will be turned in opposite directions.

By reference to Figs. 5 and 6, it will be noted, that the hub 12 is passed with clearance through an opening in the casing 5 so that said hub and the arm 15 which supports the same, are capable of slight vibratory movements for an important purpose, presently to be noted.

\Vorking between the concentric frictional surfaces, afforded by the inner portion of the hub 12 and its concentric flange 12, is a small driven friction wheel 19, preferably having a non-metallic frictional facing, and rigidly secured to the spindle 20, journaled in a sleeve-lil e boss 21 on the casing This wheel 19 is of such diameter that it will engage at one time with the friction flange 12 and at another time with the hub 12, but never with both at the same time. The outer end of the spindle 20 is connected by a flexible shaft 22, preferably in the form of a coiled spring, to one end of a shaft 23 journaled in suitable bearings 24 and 25, respectively, on the casing 5 and on the door frame 1. This shaft 23 carries a reticulate agitating blade 26, preferably formed of wire screen. Preferably, a sec ond agitator is employed and the end of the shaft 23 is therefore connected by another coiled spring 27 to the upper end of a vertical shaft 28 j ournaled in suitable bearings 29 on the door frame 1 and provided with a reticulate agitating blade 30.

The operation of the device may be briefly described as follows: When the door is opened, it will draw the cable or cord 9 and the door movement, then becoming the dominant force, will, operating through the oscillatory arm 15, move the hub 12 so that its flange 12" will then be frictionally engaged with the friction wheel 19, thereby rotating the shaft 23 in the direction of the arrows marked on Fig. 3. hen the door is released and is closed by the spring a, the said spring then becomes the dominant force, pulling in the opposite direction on the free end of the arm 15 and throwing the hub 12 into engagement with the friction wheel 19, thereby continuing the rotation of the shaft 23 in the direction just stated. It will thus be seen that by alternately engaging the concentric friction surfaces of the driving hub, the one with the inner surface and-the other with the outer surface of said wheel 19, rotation of the agitators in the same direction is accomplished both by closing and opening movements of the door. Preferably, the direction of rotation of the agitators is in the direction stated so that the flies will be driven backward, or away from the door when rotated, rather than forced or chased through the open door.

In practice, a device of this kind has been found highly efficient for preventing flies from entering open doorways.

The device is capable of general use, but is especially serviceable in connection with store doors and other places where the doors are very frequently opened and closed.

What I claim is:

1. The combination with a door, of a rela tively fixed casing secured adjacent to said door, a spring actuated drum journaled on said casing, an idle guide sheave journaled on said casing, a. rotary agitator located adjacent to said door, a driven friction wheel mounted on said casing and connected to said agitator, a driving friction wheel associated with said casing, having concentric frictional surfaces relatively engageable with said driven friction wheel, said driving friction wheel having a limited oscillatory movement to effect said alternate engagement and having a projecting hub, and a cable connecting said spring actuated drum to said door and passed in one direction around said idle guide sheave and up the opposite direction around the hub of said driving friction wheel, the said casing having upper and lower bosses to either of which said idle guide sheave may be journaled whereby the said device is made reversible for doors swinging in either direction.

2. The combination with a door, of a relatively fixed casing secured adjacent to said door, a spring actuated drum journaled 011 said casing, an idle guide sheave journaled on said casing, a rotary agitator located adj acent to said door, a driven friction wheel mounted on said casing and connected to said agitator, a driving friction wheel associated with said casing, having concentric frictional surfaces relatively engageable with said driven friction wheel, said driving friction wheel having a limited oscillatory movement to effect said alternate engagement and having a projecting hub, a cable connecting said spring actuated drum to said door and passed in one direction around said idle guide sheave and up the opposite direction around the hub of said driving friction wheel, the said casing having upper and lower bosses to either of which said idle guide sheave is adapted to be journaled, and a bearing arm adapted to be pivotally connected to either of said bosses and afiording an oscillatory support for said driving friction wheel.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH W. SHUMATE.

Witnesses:.

BERNIOE G. WHEELER, F. D. MERCHANT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

